The Best Estimator of the Difference Between Two Population Means $\mu _ { 1 } - \mu _ { 2 }$

question 96

True/False

The best estimator of the difference between two population means $\mu _ { 1 } - \mu _ { 2 }$ is the difference between two sample means $\bar { x } _ { 1 } - \bar { x } _ { 2 }$ .

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